CBEST Math: Estimation and Measurement 4

Question 1

A map has a scale of 1 inch = 25 miles. Two cities are 3.6 inches apart on the map. What is the actual distance?

Accepted Answer

90 miles

Answer

3.6 inches × 25 miles/inch = 90 miles.

Question 2

A tank is being filled at 2.4 gallons per minute. Approximately how long will it take to fill a 100-gallon tank?

Accepted Answer

About 42 minutes

Answer

100 ÷ 2.4 ≈ 41.7 minutes, which is approximately 42 minutes.

Question 3

How many square feet are in 3 square yards?

Accepted Answer

27 sq ft

Answer

1 square yard = 9 square feet, so 3 square yards = 27 square feet.

Question 4

A box weighs 4.72 kilograms. Which is the best estimate rounded to the nearest kilogram?

Accepted Answer

5 kg

Answer

4.72 rounded to the nearest whole kilogram is 5 kg, since the tenths digit (7) is ≥ 5.

Question 5

A student estimates that 12% of 498 is about 60. Is this estimate reasonable?

Accepted Answer

Yes, it is reasonable

Answer

10% of 500 = 50, and 12% is slightly more, so about 60 is a reasonable estimate.

CBEST - California Basic Educational Skills Test Practice Test